Guardian Bikes is a privately held, U.S.-based e-commerce company that sells bicycles online. All Guardian Bikes are fitted with their patented SureStop braking system. In 2017, Mark Cuban, the owner of the Dallas Mavericks, invested in Guardian Bikes after the founders appeared on Shark Tank.
After partnering with existing brands to make SureStop standard equipment on adult bicycles, the founders' attention shifted to children's bike safety. Guardian Bikes was founded in Irvine, California in 2015 to manufacture safe bicycles for children ages six through twelve using their patented SureStop braking system. In 2017, the founders of Guardian Bikes appeared on Shark TankShark Tank and completed an investment deal with Dallas Mavericks owner Mark Cuban.